PH 13 C 5
ActiveZea mays L. · Maize
Pioneer Overseas Corporation, USA
UA
8 records
Variety traits
Heterosis
Heterosis is the effect of first-generation hybrids superiority over parental forms in terms of viability, productivity, and resistance to external factors.
Mentioned in descriptions 472 varieties reference book.
Heterosis, often referred to as "hybrid vigor", manifests in the superiority of first-generation hybrids over parental forms in key biological and economic traits. The effect is most noticeable in quantitative traits with low heritability, such as growth energy, fertility, adaptability, and total yield. A characteristic feature is its maximum expression exclusively in the first generation, with a gradual attenuation in subsequent ones, which precludes the use of hybrid seeds for further sowing.
The evaluation of heterosis is carried out quantitatively through the percentage excess of the hybrid's indicators relative to parents or standards. A distinction is made between true heterosis, comparing the hybrid with the best parent; hypothetical heterosis, based on the average value of both parents; and competitive heterosis, where the best variety currently on the market is taken as a baseline. The stability of this effect depends on the combining ability of the parental lines and specific agro-climatic growing conditions.
Within the framework of variety testing, the success of a hybrid is determined by a complex of economically valuable traits and an analysis of its performance in field conditions. The lack of superiority or indicators lower than parental forms are qualified as the absence of heterosis or depression. The relative values of the effect vary depending on the crop, with high indicators reaching tens of percent confirming the efficiency of the chosen combination of parental forms.
Breakdown by crop
Found in these crops
Varieties that feature this in their description
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
PHD 0 G
ActiveZea mays L. · Maize
PIONEER OVERSEAS CORPORATION
UA
7 records
Hybriforce 2400
ActiveMedicago sativa L. · Alfalfa
Velde Mike John
DE
UA
6 records
2607 A
ActiveHelianthus annuus L. · Sunflower
Y. Stoyanova, P. Petrov, V. Velkov, A. Piskov, P. Ivanov, P. Shindrova, F. Tsvetkova, I. Ivanov
BG
UA
4 records
UQL-1
ActiveMedicago sativa L. · Alfalfa
THE UNIVERSITY OF QUEENSLAND ST. LUCIA CAMPUS
IT
7 records
Marder
Protection expiredSecale cereale L. · Rye
Saatzucht Lochow-Petkus (DE)
AT
BE
CZ
DE
DK
EE
+7
20 records
Hymalaya
ActiveTriticum aestivum L. · Bread wheat
Saaten-Union
DK
EE
LT
PL
UA
15 records
KWS Rixor
ActiveSecale cereale L. · Rye
KWS Lochow
AT
DE
DK
EE
FI
PL
11 records
SU Mephisto
ActiveSecale cereale L. · Rye
Hybro Saatzucht, D
DE
PL
UA
11 records
Hystar
ActiveTriticum aestivum L. · Bread wheat
Saaten Union, F
FR
HR
LT
8 records
ES Cirrius
ActiveZea mays L. · Maize
Pierre CAROLO
AT
DE
UA
9 records
KWS Voltano
WithdrawnSecale cereale L. · Rye
KWS Lochow
AT
DE
DK
EE
PL
UA
6 records
DK Extrovert
ActiveBrassica napus var. napus · Rapeseed
Nelly Guguin, Detlef Hauska,
DK
FR
IE
UA
7 records
Contiflor 3
ActiveHelianthus annuus L. · Sunflower
ICI SEEDS DIVISION AGRICOLA
IT
7 records
Mihelca
ActiveTriticum aestivum L. · Bread wheat
Daniel Shkoro
HR
SI
UA
9 records
ES Hornet
ActiveZea mays L. · Maize
Pierre CAROLO
BG
HU
IT
UA
8 records
ES Inventive
ActiveZea mays L. · Maize
Pierre CAROLO
AT
DE
UA
9 records
Hybiza
ActiveTriticum aestivum L. · Bread wheat
Saaten Union Recherche SARL, Estrées-Saint -Denis FR
FR
HU
6 records
SY Canyon
ActiveHordeum vulgare L. · Barley
Syngenta Crop Protection AG
DK
IE
7 records
Ph1k2
ActiveZea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL
HU
UA
5 records
Hybello
ActiveTriticum aestivum L. · Bread wheat
Saaten Union Recherche SARL, Estrées-Saint -Denis FR
FR
HU
6 records
PH1M3D
ActiveZea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL
SY Baracooda
ActiveHordeum vulgare L. · Barley
Syngenta Participations AG
DE
PL
9 records
Hyxperia
ActiveTriticum aestivum L. · Bread wheat
Saaten Union Recherche (FR)
FR
5 records